不可以缩写，她只能是these are 的形式，they're不会造成连读的现象，these are会连读成／diza／的音
重点词汇
these这些的; 这些
例句：
These are new products from our plant.
这都是我们厂的新产品。
These are my children.
这些都是我的孩子。
These are just a few of the many options available.
这些只不过是众多可能的选择中的几个。
These are the cells that directly attack and kill micro-organisms
这些细胞可以直接攻击和杀死微生物。
But these are troubled times and many people fear for the future.
但这是乱世，很多人都为未来担心。
These are only a few of the possibilities
这些仅仅是其中几种可能。
These are just two ordinary houses.
这是两所普通的房子。